Malicious PDF — malware analysis report

Static analysis result for SHA-256 6352196fcd7c01ac…

MALICIOUS

PDF

44.2 KB Created: 2020-08-31 18:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df32f3821bd1130cf186ec0b7d84cde0 SHA-1: 9bab95c9ee20cd6b8204b399b2be3a476f196d2b SHA-256: 6352196fcd7c01ac5969a9c871916b2c9900c6711dd7493fc300a345ce507bc2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs that redirect to known malicious infrastructure, specifically a URL designed to appear related to 'adobe illustrator size'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains similar URLs, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.club/wix?keyword=adobe+illustrator++size
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/078c79_89b05230e3f548df8e39d7170013520b.pdf
    • https://static.usrfiles.com/ugd/5b9365_a3924dba80ad45549ffe949692f32685.pdf
    • https://static.usrfiles.com/ugd/b4a829_cb775e62424d4b3b9ebd710c6b6a097b.pdf
    • https://cdn.shopify.com/s/files/1/0462/3007/7594/files/division_of_polynomials_by_binomials_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0444/7302/4679/files/14631176177.pdf
    • https://cdn.shopify.com/s/files/1/0429/7274/1791/files/jabariya_jodi_2019_movie_openload.pdf
    • https://cdn.shopify.com/s/files/1/0434/2782/3778/files/boxford_lathe_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/donojugidupoxonojibawuso.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44484222312.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/lotuzap.pdf
    • https://cdn.shopify.com/s/files/1/0434/6707/9830/files/vexupasopejupaxubomefali.pdf
    • https://cdn.shopify.com/s/files/1/0431/2236/0469/files/graphic_design_the_new_basics_1st_edition.pdf
    • https://static.usrfiles.com/ugd/b8c837_be0534bbc0234e57ba9464a9c57a1341.pdf
    • https://static.usrfiles.com/ugd/b8c837_68c779775dc84d89981327673fac6f1a.pdf
    • https://static.usrfiles.com/ugd/4479ed_698c7efb6d1446e69c412bb27fb56b5a.pdf
    • https://static.usrfiles.com/ugd/6f9b04_3d12f13248ff4194a3a134dfe0bb51d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_e9d795a3549d41608b705ae0f41ce733.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fab.bin
acbeac43e10b757483e457f14c9c799bd798ff1fd34af7cefd4f09a3951e49d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAB 4996 bytes
font_01_sfnt_off000080b6.bin
5908323e5cef9366d04dfb0a5298def038a2f527336da9469d85f47ca9175a36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80B6 10316 bytes

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